Pump.



G. E. HAAR.

PUMP.

APPLICATION FILED MAY27, 1911. RENEWED JAN. 14.1916.

Patented Feb. 15,1916.

INVENTOR a 5 H6060? Allarneyd WITNESSES To all whom it may concern:

nivrrnp were t me arrio;

. GUSTAV-E. Hahn, or ANACOSTIA, DISTRICT be COLUMBIA, ASSIGNQR To JOHN H- STEPHENS, OE VERNON, TEXAS.

7 PUMP.

Specification oi! Letters'Patentl Patented Feb. 15, 1916. i

Application filed m 27,.1911,:Seria1,No. 629,763. Renewed Januar ii, 1916. Serial ire/r2482.

, Be it known that I, GUSTAV E; HAAR, a citizen of theUnited States of America, residing. at Anacostia, in the District of Columbia, have invented certain new" anduse- V ful Improvementsin Pumps, of which the followingis a specification, reference being hadtherein to the accompanying drawing.

This invention relates to certain new and useful improvements in pumps, and more specifically to that type known as lift pumps designed for use in connection with deep Oll wells, Artesian wells, and domestie'pur-v poses.

One of the difficulties. encountered in the operation of many forms of lift pumps as heretofore constructed, is the refusal of the foot valve'to operate or seat,.due to the ex: cessive pressure caused by the liquidrising toward :the surface, and this is especially so in wells of great depth, thus rendering the pump ineffective in'use.

The main. object of my invention is to overcome thisdifficulty which I accomplish by a pump in which the pistonacts as the valve, and in which pump a vacuum is.

created within the pump barrel on the down stroke of the piston, whereby the entrance of liquid into the pump barrel is materially facilitated.

vide a pump having a retainer valve for retalningthe liquid raisedlnto the pump, and in which, the greater the depth of the well,

the more effectively the retainer valve is strong, durable, and comparatively inexpensive to manufacture;

H-With the above and other objects in view, the invention consists in'the novel construction, combination and arrangement of parts to be hereinafter specifically described andthen claimed, and in describing the invention in detail, reference will be hadto the accompanying"drawings forming a part of y the specification and illustratmg a preferred embodiment of the invention, without, however, intending to confine myself to the spei cific BmbOdImGHtShOY/VH QSHI practice, various changes may bemade in the details of I H Fig. 2 isa cross sectional view takenron the line 22 of Fig. 1, and, Fig. 3 is a similar view taken on the line 33 of F ig; 1-.

To put my invention in practice, I provide a pumpbarrel or working-cylinder 5 open; at both ends and of suitablecdiameter and-length as existing conditions may require, Suitably secured as by threading tothe upper end of said barrel or cylinder, is; a shell formed in two sections or members, (land 7 respectively[ The lower member .6 comprises an annular bodyportion having adepending interiorly-threaded flange 8. for connection with the exteriorly-threadedrupper end of the barrel or cylinder 5. -This member 6 ofthe shell is also provided on its upper-face, intermediate the marginal sides of the memberfwith an upwardly-extending annular exteriorly-threaded annular invention. or scope thereof as V threaded lower portion of the upper mem-' her 7. The lower member is also provided with a valve seat 10 which is engaged bythe, Anotherobject of my invention is to proretainer valve 11 sleeved onto the piston-rod 12. The retainer valve 11 has combined with it an extended bearing-sleeve 14 preferably somewhat enlarged at its upper end and provided with a valves eat 15 which is engaged'by a valve '16 carried by the piston rod12. The sleeve :14 providesv a relativelylong bearing for therod 12, and obviously, when this sleeve is provided, the valve seat 15 must be at the outer or upper end'of the sleeve, though where the long hearing may not be required, as in comparatively shallow wells, the shortening of the sleeve, or, the omission thereof and the formation of the valve seat close to or in the upper face of the retainer-valve 11, with a corresponding change in position of the valve 16 on the rod 12, will in no wise change the function or operation of the parts 15, 16.- The upper member (of-the shell 1s sub-- stantially bell-shaped, "and as stated is threaded onto thefla'nge 9 of thel'ower mem ber 6. On its inner face this memberlis profvided with apluralit'y of lugs 17 whichpr oject inwardly ofjth'e shell a sufficient d1spipe, which, it will be understood is, where the depth of. the well requires it, formed of a plurality of connected sections of tubing, the lowermost of which has itslower end threaded into the neck 7 of the upper member The piston 19, which also acts as the pump valve, comprisesa hollow. body having a closed lower end 20 to which the lower end of the piston rod 12 is connected as by The pis-I a threaded-connection as shown. ton 19 is provided with one ormore inlet openings 21,preferably four inthis instance, which are equally spaced around the body. On its upper end, the piston bodyis peripherally grooved to form an annular channel for the reception. of a suitable packingQQ, the grooving of the piston peripherally forming. an annular upwardly-extending flange 23 which is interiorly screw-threaded to receive a gland 24 angular in cross-section and the horizontal flange of which holds the packing within the groove provided therefor in the piston body.

In operation, assuming the parts are assembled, as above described, and the piston in the position shown in Fig. 1,. it will be evident that the liquid in the well will en ter through inlet openings 21and rise in the barrel or cylinder to the height of the liquid in the well, the pressure of the liquid raising the retainer valve 11 in case there be no liquid in the shell and well tubing. On the rip-stroke ofthe piston, the closed lower end thereof shuts off the flow of liq uid through the inlet openings and into the barrel or cylinder as soon as said closed end enters the latter, the retainer valve being restrained by the stops 17 and the rod '12 moving upward through the sleeve 14:. On

the down stroke of the. piston, the pressure of liquid above the retainer valve being greater than the pressure below it causes the valve to seat and as the piston moves down,-

a vacuum is created in the barrel or cylinder below the retainer valve and above the piston. As soon as the closed endiof the piston passes out of the barrel or cylinder, the ports 21 begin to uncover and the liquid in the well rushes into the vacuous space above the piston, thus greatly facilitating the charging of the barrel or cylinder for the succeeding up-stroke of the piston. The valve 16 is provided so as to eifectively prevent leakage of the raised column of liquid that isabove the retainer valve along the sleeve 14 and rod 12 when the piston is atthe end of the down stroke or the pump inactive and the retainer valve seated. WVith' this construction; it is to be observed that the principle of the usual lift pump is reversed, a vacuum being created on. the clown-stroke of the piston so as to form a vacuous space;

above the piston, and theconsequent aiding of, a rapid inflow of liquid and effectivefilling of the cylinder upon the vacuum beingf broken. In order that the pump may work equally well in deepwells, as .in'comparatively shah low wells, it is desirable that means be pro 'ided whereby fluid may enter the cylinder. prior to the lowerend of the inlet opening.- moving below the lower end of said cylin-iv der, so that too great a vacuum may notf be created during the latter part of the down-; ward stroke of the piston, which would in-? ter-fe're'with the easy operation of the. pump; To this end, the piston. in the embodiment of :my invention herein shown. is circumfere. entially reduced betweenits ends as clearly illustrated in Fig.1, and the inlet openings are made in thisreduced portion, andarc. of less length than the width of suchwreduced portion, the upper and lower walls of the reduced portion, especially. the lower wall, being flared. As soon therefore,as the lower flared wall begins to uncover, liquid is permitted to enter thecylinderin small quantities, decreasing the vacuum and permitting the piston to complete its I down stroke with ease.

IVhile I have described in detail a practical embodiment ofzthe invention as. practised; by me, yet it will be evident that various changes may be made in the details of construction without; alteration of the spirit or scope of the-invention.

What, I claimis:'

1. In a liftl-pump, a working cylinder, "a piston rod, a piston thereon working in the cylinder, a retainer valve sleeved on the rod, av valve seat on the sleeve of the retainer valve, and a valve on the rod to vengagensaid 3 seat. I

2. In a lift pump, a pump cylinder, a shell connected to theupper end thereof and provided interiorly thereof with a valve seat a retainer valvevforzengagement with sai seat, a piston rod workingthrough the. Tea tainer valve, a piston carried-by the rod and working in said cylinder, a valve" can ried by the piston rod abovethe retainer. valve, and a valve seat surrounding the piston rod and engaged by said piston rod. valve'when the piston is at the end of'its. down-stroke.

3. In a liftpump, a pump cylinder, a shell connected. to the upper end thereof and pro.- vided interiorly with avalve seat, a retainer valve for engagement wvith. said seat and j movable vertically in the shell under presr ITO.

sureof liquid above and below said valve,-

piston carried by the rod and Working in said cylinder, a valve on said rod above the retainer valve, and a valve seat surrounding the piston rod and engaged by said valve when the piston is at the end of its downstroke in the cylinder.

4. In a lift pump, a pump cylinder, a shell connected to the upper end thereof, a tube or well casing connected to said shell, a retainer valve movable vertically in said shell under the pressure of liquid above and below said valve and having combined with it asleeve provided in its upper end with a valve seat, lugs carried by the interior wall of the shell for limiting the upward move ment of the retainer valve, a piston rod working through the-retainer valve and carrying a valve to engage the valve seat on theretainer valve, and a piston on said rod working in the cylinder and provided with inlets through which the liquid enters the cylinder, the ports in thepiston being formed in a manner to permitthe entry of fluid within said cylinder prior to the lower end of the inlet port moving completely below the lower end of said cylinder..

5. In a lift pump, a pump cylinder, a

shell under the pressure of liquid above and f below'said valve and provided with-a valve seat, lugs carried by the interior wallof the a shell for limiting the upward movement of the retainer "valve, a piston rod working through the retainer valve and carrying valve engaging the valve seat of the retamer valve, a piston'on said rod working in the cylinder and'provided with inlets through which the liquid enters the cylin-.

der, and means for preventing leakage along e P ston rodof the liquid: raised above the retainer valve, the portsin the piston beingformed in a mannerto permit 7 the entry of fluid within said cylinder prior to the lower end of the inlet port moving completely below the lower end of sai'dcylinder.

In testimony whereof I aflix my signature in the presence oftwo witnesses. a v V GUSTAV E. HAAR. Witnesses j i H. G. Snrrz, L. W. ANDERSON.

Copies of this patent may be obtained for five cents each, by addressing the Commissioner of Patents,

Washingtomi). G. V 

